package com.bitejiuyeke.forum.controller;

import com.bitejiuyeke.forum.common.AppResult;
import com.bitejiuyeke.forum.common.ResultCode;
import com.bitejiuyeke.forum.config.AppConfig;
import com.bitejiuyeke.forum.model.User;
import com.bitejiuyeke.forum.services.IUserService;
import com.bitejiuyeke.forum.utils.MD5Util;
import com.bitejiuyeke.forum.utils.UUIDUtil;
import io.swagger.annotations.Api;
import io.swagger.annotations.ApiOperation;
import io.swagger.annotations.ApiParam;
import lombok.NonNull;
import lombok.extern.slf4j.Slf4j;
import org.springframework.web.bind.annotation.*;

import javax.annotation.Resource;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpSession;

//对controller进行api说明
@Api(tags = "用户接口")
//日志注解
@Slf4j
//这是一个返回数据的controller
@RestController
//路由映射，一级路径
@RequestMapping("/user")
public class UserController {

    @Resource
    private IUserService userService;

    /**
     * 用户注册
     * @param username 用户名
     * @param nickname 用户昵称
     * @param password 密码
     * @param passwordRepeat 重复密码
     * @return
     */
    @ApiOperation("用户注册")
    @PostMapping("/register")
    public AppResult register(@ApiParam("用户名") @RequestParam("username") @NonNull String username,
                              @ApiParam("昵称") @RequestParam("nickname") @NonNull String nickname,
                              @ApiParam("密码") @RequestParam("password") @NonNull String password,
                              @ApiParam("确认密码") @RequestParam("passwordRepeat") @NonNull String passwordRepeat) {
        // if (StringUtil.isEmpty(username) || StringUtil.isEmpty(nickname)
        // || StringUtil.isEmpty(password) || StringUtil.isEmpty(passwordRepeat)) {
        //     //返回错误信息
        //     return AppResult.failed(ResultCode.FAILED_PARAMS_VALIDATE );
        // }

        //校验密码和重复密码是否相同
        if (!password.equals(passwordRepeat)) {
            log.warn(ResultCode.FAILED_TWO_PWD_NOT_SAME.toString());
            //返回错误信息
            return AppResult.failed(ResultCode.FAILED_TWO_PWD_NOT_SAME);
        }

        //准备数据
        User user = new User();
        user.setUsername(username);
        user.setNickname(nickname);
        //处理密码
        //1.生成盐
        String salt = UUIDUtil.UUID_32();
        //2.生成密码的密文
        String encryptPassword = MD5Util.md5Salt(password, salt);
        //3.设置密码和盐
        user.setPassword(encryptPassword);
        user.setSalt(salt);

        //调用service层
        userService.createNormalUser(user);
        //返回成功
        return AppResult.success();
    }

    /**
     * 用户登录
     * @param username 用户名
     * @param password 密码
     * @return
     */
    @ApiOperation("用户登录")
    @PostMapping("/login")
    public AppResult login(HttpServletRequest request,
                           @ApiParam("用户名") @RequestParam("username") @NonNull String username,
                           @ApiParam("密码") @RequestParam("password") @NonNull String password) {
        //1.调用service中的登录方法，返回user对象
        User user = userService.login(username, password);
        if (user == null) {
            //打印日志
            log.warn(ResultCode.FAILED_LOGIN.toString());
            //返回结果
            return AppResult.failed(ResultCode.FAILED_LOGIN);
        }
        //2.如果登录成功，把user设置到session作用域中
        HttpSession session = request.getSession(true);
        session.setAttribute(AppConfig.USER_SESSION,user);
        //3.返回结果
        return AppResult.success();
    }

    @ApiOperation("获取用户信息")
    @GetMapping("/info")
    public AppResult<User> getUserInfo(HttpServletRequest request,
                                       @ApiParam("用户Id") @RequestParam(value = "id",required = false) Long id) {
        //定义返回的user对象
        User user = null;
        //根据id的值判断user对象的获取方式
        if (id == null) {
            //1.如果id为空，从session中获取当前登录的用户信息
            HttpSession session = request.getSession(false);
            //从session中获取当前登录用户的信息
            user = (User) session.getAttribute(AppConfig.USER_SESSION);
        }else {
            //2.如果id不为空，从数据库中按id查询用户信息
            user = userService.selectById(id);
        }
        //判断用户对象是否为空
        if (user == null) {
            return AppResult.failed(ResultCode.FAILED_USER_NOT_EXISTS);
        }
        //返回正常的结果
        return AppResult.success(user);
    }

    @ApiOperation("退出登录")
    @GetMapping("/logout")
    public AppResult logout(HttpServletRequest request) {
        //获取session对象
        HttpSession session = request.getSession(false);
        //判断session是否有效
        if (session != null) {
            //打印日志
            log.info("退出成功");
            //表示用户在登录状态，直接销毁session
            session.invalidate();
        }
        return AppResult.success("退出成功");
    }

}
